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Straw charring returning soil amendment and preparation method

A soil conditioner and straw carbonization technology, applied in the field of agricultural soil, can solve problems such as aggravation of crop diseases and increase of soil bacteria, and achieve the effects of large yield, increased content and stability, and improved ventilation and water permeability.

Inactive Publication Date: 2017-10-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Straw returning to the field has a significant effect on increasing fertilizer and production, and generally can increase production by 5% to 10%. However, if the method is not appropriate, it will also lead to an increase in soil pathogens, aggravation of crop diseases, and lack of seedlings (sick seedlings) and other adverse phenomena

Method used

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  • Straw charring returning soil amendment and preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a soil conditioner suitable for straw carbonization and returning to the field, using such as figure 1 Preparation of supporting equipment. 1 is the motor, 2 is the feeding hopper, 3 and 5 are coaxial tubular retorts, vacuum holes 4 and 6 and liquid collection holes 7 and 8 are set on the tubular retorts, and continuous forced conveying screws are installed in the whole device 9. Vacuum devices are installed sequentially from the feed end to the discharge end, and the carbonization temperature is gradually increased from 100°C to 400°C from the feed end to the discharge end, and a water condensation device is installed at the outlet of each vacuum port. During production, the raw materials with 50 parts by weight of straw, 20 parts by weight of lignite powder and 20 parts by weight of zeolite are dried and pulverized, and the power system and heating system are turned on. -30~50kPa, the volatile matter is collected and enters the condensing devic...

Embodiment 2

[0027]A soil improver suitable for carbonization and returning of corn stalks to the field. Its production plan is to use a 2-stage retort reactor, turn on the power system and heating system, set the first retort tank to 150°C, and maintain the vacuum at -20kPa; The second-stage retort is set at 350°C, and the vacuum degree is maintained at -60kPa; the third-stage retort 5 is set at 400°C, and the vacuum degree is maintained at -90kPa. Finally, the carbonized straw, lignite powder, and zeolite powder absorbing wood vinegar are extruded and granulated to a diameter of 3mm, which is the soil conditioner.

[0028] Among them, the raw materials for the production of this type of soil improver include corn stalks, sorghum stalks or millet stalks, lignite powder, and zeolite. field.

Embodiment 3

[0030] A soil improver suitable for straw carbonization and returning to the field in vegetable fields. Its production plan is to use a 2-stage retort reactor, turn on the power system and heating system, set the first retort tank to 200°C, and maintain the vacuum at -40kPa; The second-stage dry distillation tank 5 is set at 400°C, and the vacuum degree is maintained at -90kPa. Finally, the carbonized straw, lignite powder, and zeolite powder absorbing wood vinegar are extruded and granulated to a diameter of 3mm, which is the soil conditioner.

[0031] Among them, the raw materials for the production of this type of soil improver include various vegetable straws, lignite powder, and zeolite. The formula is formulated according to the actual soil test data of the farmland, and it is suitable for soil improvement of common vegetable fields. The main purpose is to return the straw to the field to increase fertilizer.

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Abstract

An object of the invention is to provide a straw charring returning soil amendment and preparation method. Through straw charring and separation and extraction of phenol and ethanol in advance, a soil amendment composed of straw char, brown coal powder, and pyroligneous-liquor-adsorbing zeolite is made. The soil amendment can promote dispersed soil particles to agglomerate, so that granules are formed. The content and stability of water-stable granules in soil are improved, and the ventilation, water penetration, water retention and fertilizer conservation are improved. The soil amendment is made through a tubular destructive distillation reactor. Straw is fully returned, no air pollutant is produced, and the soil ecology forms a complete cycle. The method integrates separation and extraction, composition and carbonization into one body, is continuous in production, large in yield, and stable in product quality, and is suitable for massive production.

Description

technical field [0001] The invention belongs to the technical field of agricultural soil, and in particular relates to a soil improver for straw carbonization and returning to the field and a preparation method thereof. Background technique [0002] Land is the most important means of agricultural production. Since the reform and opening up, the steady improvement of agricultural production capacity has provided strong support for the rapid development of my country's economy, but at the same time it has overdrawn the potential of land production to a certain extent. On the one hand, the long-term and extensive use of chemical fertilizers has caused a series of problems such as reduced fertilizer efficiency, soil compaction, and water pollution; on the other hand, high-intensity agricultural production and land use have led to increasingly serious problems such as soil acidification and desertification, which have become constraints The bottleneck of my country's agricultura...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C10B53/02C05G3/80
CPCC05D9/00C05G3/00C05G3/80C10B53/02C05F11/00C05F11/02Y02E50/10
Inventor 陈庆曾军堂陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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